1 mai 2015
Sapphire ring, Fontana
Lot 470. A 31.52 carats Kashmir step-cut sapphire ring, Fontana. Estimation 195,000 — 295,000 CHF. Lot sold 2,110,000 CHF. Photo Sotheby's. Claw-set with a step-cut sapphire weighing 31.52 carats, size 54, signed Fontana, French assay mark. Accompanied...